Replace std::map with base::SmallMap in ui::LatencyInfo

content/renderer/render_widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/debug/trace_event_synthetic_delay.h"
@@ skipping 1019 matching lines @@
   if (!animation_update_pending_ && !paint_aggregator_.HasPendingUpdate()) {
     TRACE_EVENT0("renderer", "EarlyOut_NoPendingUpdate");
     return;
   }
 
   // Continue painting if necessary...
   DoDeferredUpdateAndSendInputAck();
 }
 
 void RenderWidget::OnHandleInputEvent(const blink::WebInputEvent* input_event,
-                                      ui::LatencyInfo latency_info,
+                                      const ui::LatencyInfo& latency_info,
                                       bool is_keyboard_shortcut) {
   handling_input_event_ = true;
   if (!input_event) {
     handling_input_event_ = false;
     return;
   }
 
   base::TimeTicks start_time;
   if (base::TimeTicks::IsHighResNowFastAndReliable())
     start_time = base::TimeTicks::HighResNow();
 
   const char* const event_name =
       WebInputEventTraits::GetName(input_event->type);
   TRACE_EVENT1("renderer", "RenderWidget::OnHandleInputEvent",
                "event", event_name);
   TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("blink.HandleInputEvent");
 
   scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor;
-
+  ui::LatencyInfo swap_latency_info(latency_info);
   if (compositor_) {
     latency_info_swap_promise_monitor =
-        compositor_->CreateLatencyInfoSwapPromiseMonitor(&latency_info).Pass();
+        compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info)
+            .Pass();
   } else {
     latency_info_.push_back(latency_info);
   }
 
   base::TimeDelta now = base::TimeDelta::FromInternalValue(
       base::TimeTicks::Now().ToInternalValue());
 
   int64 delta = static_cast<int64>(
       (now.InSecondsF() - input_event->timeStampSeconds) *
           base::Time::kMicrosecondsPerSecond);
@@ skipping 89 matching lines @@
       rate_limiting_wanted =
           total_input_handling_time_this_frame_.InMicroseconds() >
           kInputHandlingTimeThrottlingThresholdMicroseconds;
   }
 
   if (!WebInputEventTraits::IgnoresAckDisposition(input_event->type)) {
     scoped_ptr<IPC::Message> response(
         new InputHostMsg_HandleInputEvent_ACK(routing_id_,
                                               input_event->type,
                                               ack_result,
-                                              latency_info));
+                                              swap_latency_info));
     if (rate_limiting_wanted && event_type_can_be_rate_limited &&
         frame_pending && !is_hidden_) {
       // We want to rate limit the input events in this case, so we'll wait for
       // painting to finish before ACKing this message.
       TRACE_EVENT_INSTANT0("renderer",
         "RenderWidget::OnHandleInputEvent ack throttled",
         TRACE_EVENT_SCOPE_THREAD);
       if (pending_input_event_ack_) {
         // As two different kinds of events could cause us to postpone an ack
         // we send it now, if we have one pending. The Browser should never
@@ skipping 1649 matching lines @@
 
 void RenderWidget::RegisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterSwappedOutChildFrame(RenderFrameImpl* frame) {
   swapped_out_frames_.RemoveObserver(frame);
 }
 
 }  // namespace content